CN216374721U

CN216374721U - Pull rod assembly

Info

Publication number: CN216374721U
Application number: CN202121252835.8U
Authority: CN
Inventors: 郑小平
Original assignee: Zhejiang Tianyuan Electromechanical Co ltd
Current assignee: Zhejiang Tianyuan Electromechanical Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2022-04-26
Anticipated expiration: 2031-06-04

Abstract

The utility model provides a pull rod assembly, and belongs to the technical field of automobile accessories. It has solved the not good problem of dustproof effect. It includes the pull rod and connects in the joint Assembly of pull rod one end, joint Assembly includes connecting seat and ball round pin, the ball round pin is including being located the connecting seat and can wobbling bulb and with the bulb link firmly mutually and stretch out the outer round pin axle of connecting seat, be equipped with the cylindric dust cover that is both ends opening between connecting seat and the round pin axle, the one end of dust cover is fixed outside the connecting seat, sell the epaxial ring channel that is equipped with, another port portion department of dust cover has the connecting portion one that is the cyclic annular and extend outward to the dust cover, connecting portion one inlays in the ring channel and leans on with ring channel both sides cell wall counterbalance, a connecting portion outside is equipped with makes an inner peripheral surface of connecting portion and the round pin axle outer wall of ring channel department paste tight mounting mutually. It has advantages such as dustproof effectual, stable in structure.

Description

Pull rod assembly

Technical Field

The utility model belongs to the technical field of automobile accessories and relates to a pull rod assembly.

Background

The pull rod assembly is a key component in an automobile steering system and is also an important component for ensuring the safe running of an automobile. For example, patent application No. 201720967084.5 discloses a tie rod left and right joint body assembly, which comprises a ball pin, a joint body and a rod body integrally formed with the joint body, wherein the ball pin comprises a ball head and a ball rod integrally formed with the ball head, a central opening is formed in the center of the joint body, an upper side necking and a top part of the central opening are provided with chamfers, the upper side necking is adapted to an upper half spherical surface of the ball head, a sealing cover and an elastic rubber ball seat are arranged in the central opening, the ball seat is an annular ball seat with an upper symmetrical inner spherical surface and a lower symmetrical inner spherical surface arranged on an inner ring, and the end surfaces of the top end and the bottom end of the elastic rubber ball seat are horizontal; the sealing cover is clamped at the bottom of the central opening, the elastic rubber ball seat is embedded in the central opening above the sealing cover, and the horizontal end face of the bottom of the elastic rubber ball seat is attached to the sealing cover; the upper and lower symmetrical inner spherical surfaces of the elastic rubber ball seat are adapted to the radian of the spherical surface of the ball head; the ball head is arranged in a spherical cavity formed by the elastic rubber ball seat and the joint body, the bottom of the ball head is cut to form a horizontal end face, and a certain gap is reserved between the ball head and the sealing cover. The elastic rubber ball seat is arranged in the joint body and is used as the ball seat matched with the ball head, so that the ball seat can play an effective supporting and buffering role, the contact area between the ball seat and the ball head is reduced, the abrasion is reduced, and the like.

Further, in order to prevent dust from entering between the ball head and the joint body to affect the movement of the ball head, the left and right joint body assembly of the tie rod is also dustproof by arranging a dust cover between the joint body and the ball rod of the ball pin. Wherein, the one end of dust cover is fixed on the connector body, but the other end of dust cover is overlapped outside the club of ball round pin and only relies on self elasticity to embrace outside the club, and the dust cover can be taken tensile deformation when the ball round pin swings, just so causes the displacement of dust cover on the club and produces the clearance between the two very easily to cause dustproof effect not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pull rod assembly aiming at the problems in the prior art, and solves the problem of poor dustproof effect.

The purpose of the utility model can be realized by the following technical scheme:

the pull rod assembly comprises a pull rod and a joint component connected to one end of the pull rod, wherein the joint component comprises a connecting seat and a ball pin, the ball pin comprises a ball head which is located in the connecting seat and can swing and a pin shaft which is fixedly connected with the ball head and stretches out of the connecting seat, a dust cover which is cylindrical and can stretch when the ball pin swings is arranged between the connecting seat and the pin shaft, and one end of the dust cover is fixed outside the connecting seat.

During assembly, the first connecting part is embedded into the annular groove and abuts against the groove walls on the two sides of the annular groove, and then the first connecting part is tightened outside the first connecting part by using the fixing part, so that the inner peripheral surface of the first connecting part is tightly attached to the outer wall of the pin shaft at the annular groove. Through the arrangement, the first connecting part can be firmly limited between the groove walls on the two sides of the annular groove, so that the first connecting part is more stable to match with the pin shaft, and no matter how the ball pin swings, the first connecting part cannot shift and cannot easily generate a gap between the first connecting part and the pin shaft, and the dustproof effect is well improved.

In the above-mentioned pull rod assembly, an annular mounting groove is formed in an outer side of the connecting portion, and the fixing member is disposed in the annular mounting groove.

The mounting is located in the annular mounting groove, and the mounting itself can not shift when the ball round pin swings like this yet, then borrows the effect of mounting to connecting portion one again, has further improved the cooperation stability between connecting portion one and the round pin axle and has improved dustproof effect.

In the above-mentioned drawbar assembly, the fixing member is a plastic clamping band.

After long-time use, the staff can tighten the plastic tightening band according to actual conditions to ensure that the first connecting part and the pin shaft are always in stable fit and contact.

In the above-mentioned pull rod assembly, as another technical solution, the fixing member is a plastic opening buckle.

In the pull rod assembly, the pin shaft is sequentially provided with the annular retaining shoulder and the annular block along the direction away from the ball head, the annular groove is formed between the annular retaining shoulder and the annular block, the pin shaft is in threaded connection with the locking nut, and the side part of the annular block is provided with two symmetrically-arranged straight surfaces.

In particular use, the pin may be fitted with other components which are then constrained to the pin by means of a locking nut. Because the ball pin can freely rotate or swing, two straight surfaces are symmetrically arranged on the side part of the annular block, so that the ball pin can be clamped by a wrench or a tool through the straight surfaces during installation, and the ball pin cannot rotate when a worker rotates the locking nut.

In foretell pull rod assembly, dust cover and connecting seat matched with one end oral area department have and be cyclic annular and to the connecting portion two that the dust cover extends outward, the connecting seat is equipped with annular cooperation groove outward, the two covers of connecting portion are in annular cooperation inslot and the two outer clamps that are equipped with of connecting portion, form annular flange between the connecting seat side that the round pin axle stretches out and one side cell wall in annular cooperation groove, connecting portion two and dust cover inside wall junction have annular depressed part, annular flange inlays in annular depressed part.

In the above-mentioned tie rod assembly, the annular recess and the annular flange are in arc surface contact.

When the ball round pin swung, the dust cover can receive the pulling force with the fixed one end of connecting seat mutually, and the connecting seat all adopts metal material to make, so the connecting seat can be with the inner wall fish tail of dust cover or cut, lead to dustproof inefficacy. Consequently, set up annular depressed part in the junction of connecting portion two and dust cover inside wall, make the annular flange of connecting seat inlay in annular depressed part, and be the cambered surface contact between annular depressed part and the annular flange, the connecting seat just can not cause damage or wearing and tearing to the dust cover when ball round pin swings like this to it prevents dust to have increased one cooperation department again, and the annular flange can not contact the inner wall of dust cover, has further guaranteed dustproof effect.

In foretell pull rod assembly, the connecting seat on run through and be provided with the mounting hole, the one end drill way aperture of mounting hole is greater than bulb external diameter and the other end drill way aperture of mounting hole is less than the bulb external diameter, the bulb is packed into the connecting seat in and the round pin axle stretches out from the less one end drill way in mounting hole aperture from the great one end drill way in mounting hole aperture, be equipped with the abrasionproof ball cover between the pore wall of mounting hole and the bulb, still be equipped with the gasket in the great one end drill way in mounting hole aperture, the connecting seat of the great one end department in mounting hole aperture inwards riveting forms the turn-ups, the gasket closely laminates with turn-ups and abrasionproof ball cover respectively.

In foretell pull rod assembly, the abrasionproof ball cover be the cylindric and adopt polyformaldehyde material to make, the one end that the abrasionproof ball cover is close to the round pin axle is the cambered surface contact with the mounting hole inner wall, and this distolateral portion of abrasionproof ball cover is provided with a plurality of bar grooves along circumference, the bar groove runs through the abrasionproof ball cover lateral wall, the length direction in bar groove is unanimous with the axial of round pin axle mutually.

The abrasionproof ball cover adopts the polyformaldehyde material to make and has self-lubricating nature, the one end lateral part that is close to the round pin axle at the abrasionproof ball cover is provided with a plurality of bar grooves along circumference simultaneously, the bar groove runs through the lateral wall of abrasionproof ball cover and the length direction in bar groove is unanimous with the axial of round pin axle, make this end of abrasionproof ball cover possess stronger deformability like this, can not only make the abrasionproof ball cover contact with mounting hole pore wall and bulb outer wall better and form the abrasionproof, the resistance when the ball round pin swings has still been reduced simultaneously. If these strip-shaped grooves are not provided, the anti-abrasion ball sleeve is not easy to deform when the ball pin swings, so that large resistance is caused to the swing of the ball pin, and the action is not smooth.

Compared with the prior art, the pull rod assembly has the following advantages:

1. through the arrangement of the annular groove, the first connecting part and the fixing part, the first connecting part can be firmly limited between the groove walls on the two sides of the annular groove, and the first connecting part and the pin shaft are more stably matched, so that no matter how the ball pin swings, the first connecting part cannot shift, and a gap is not easily formed between the first connecting part and the pin shaft, so that the dustproof effect is well improved;

2. an annular concave part is formed between the second connecting part and the inner wall of the dust cover, an annular flange is formed between one side face of the connecting seat extending out of the pin shaft and one side groove wall of the annular matching groove, the annular flange is embedded into the annular concave part and is in arc surface contact with the annular concave part, the connecting seat cannot damage or wear the dust cover when the ball pin swings, and the dust-proof effect is further guaranteed.

Drawings

FIG. 1 is a cross-sectional view of the present drawbar assembly.

Fig. 2 is an enlarged view of the connection seat and ball pin of fig. 1.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is an exploded view of the present tie rod assembly between the ball pin and the wear ball sleeve.

In the figure, 1, a pull rod; 2. a connecting seat; 2a, an annular matching groove; 2b, an annular flange; 2c, mounting holes; 2d, flanging; 3. a ball pin; 3a, a ball head; 3b, a pin shaft; 3b1, annular groove; 3b2, annular shoulder; 3b3, ring block; 3b31, straight face; 4. a dust cover; 4a, a first connecting part; 4a1, annular mounting groove; 4b, a second connecting part; 4c, an annular recess; 5. a fixing member; 6. locking the nut; 7. clamping a hoop; 8. an anti-wear ball sleeve; 8a, a strip-shaped groove; 9. and (7) a gasket.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 and 2, the pull rod assembly includes a pull rod 1 and a joint component connected to one end of the pull rod 1, the joint component includes a connecting seat 2 and a ball pin 3, the connecting seat 2 is in threaded connection with the pull rod 1, and the ball pin 3 includes a ball head 3a located in the connecting seat 2 and capable of swinging and a pin shaft 3b fixedly connected with the ball head 3a and extending out of the connecting seat 2. Wherein, be equipped with between connecting seat 2 and the round pin axle 3b and be the cylindric dust cover 4 of both ends opening, dust cover 4 adopts butadiene acrylonitrile rubber material to make, and dust cover 4 can carry out tensile deformation through self elasticity when ball round pin 3 swings.

Specifically, as shown in fig. 1 and 2, one end of the dust cover 4 is fixed outside the connection base 2, the pin shaft 3b is provided with an annular groove 3b1, the other end opening of the dust cover 4 is provided with a first connecting part 4a which is annular and extends out of the dust cover 4, the first connecting part 4a is embedded in the annular groove 3b1 and abuts against two side groove walls of the annular groove 3b1, and the outer side of the first connecting part 4a is provided with a fixing part 5 which enables the inner peripheral surface of the first connecting part 4a to abut against the outer wall of the pin shaft 3b at the annular groove 3b 1. Specifically, the outer side of the connecting portion 4a has an annular mounting groove 4a1, the fixing member 5 is disposed in the annular mounting groove 4a1, and the fixing member 5 is specifically a plastic tightening band. The pin 3b is sequentially provided with an annular retaining shoulder 3b2 and an annular block 3b3 along the direction away from the ball head 3a, the annular retaining shoulder 3b2, the annular block 3b3 and the pin 3b are of an integral structure, and the annular groove 3b1 is formed between the annular retaining shoulder 3b2 and the annular block 3b 3. The pin shaft 3b is in threaded connection with a locking nut 6, and the side part of the annular block 3b3 is provided with two symmetrically arranged straight surfaces 3b 31.

During assembly, the first connecting part 4a is embedded into the annular groove 3b1 and abuts against the two side groove walls of the annular groove 3b1, and then the first connecting part 4a is tightened by the fixing piece 5, so that the inner circumferential surface of the first connecting part 4a and the outer wall of the pin shaft 3b at the position of the annular groove 3b1 are attached together. Through the setting, connecting portion 4a can be firmly spacing between the both sides cell wall of ring channel 3b1 for the cooperation between connecting portion 4a and the round pin axle 3b is more stable, no matter how the ball round pin 3 swings like this, connecting portion 4a also can not appear shifting and connecting portion 4a and round pin axle 3b between be difficult for producing the clearance, has improved dustproof effect from this well.

Furthermore, a connecting portion two 4b which is annular and extends out of the dust cover 4 is arranged at an end opening portion of the dust cover 4 matched with the connecting seat 2, an annular matching groove 2a is formed outside the connecting seat 2, the connecting portion two 4b is sleeved in the annular matching groove 2a, and a clamp 7 is arranged outside the connecting portion. An annular flange 2b is formed between one side face of the connecting seat 2 extending out of the pin shaft 3b and one side wall of the annular matching groove 2a, an annular concave part 4c is formed at the joint of the second connecting part 4b and the inner side wall of the dust cover 4, and the annular flange 2b is embedded in the annular concave part 4 c. In the present embodiment, the annular recess 4c and the annular flange 2b are in arc-surface contact.

When ball round pin 3 swung, the one end that dust cover 4 and connecting seat 2 were fixed mutually can receive the pulling force, and connecting seat 2 all adopts metal material to make, so connecting seat 2 can be with the inner wall fish tail of dust cover 4 or cut, lead to dustproof inefficacy. Therefore, the annular concave part 4c is arranged at the joint of the second connecting part 4b and the inner side wall of the dust cover 4, the annular flange 2b of the connecting seat 2 is embedded in the annular concave part 4c, and the annular concave part 4c is in arc surface contact with the annular flange 2b, so that the connecting seat 2 cannot damage or wear the dust cover 4 when the ball pin 3 swings, and the dust-proof effect is further ensured.

Further, as shown in fig. 1 and 2, a mounting hole 2c is penetratingly formed in the connecting seat 2, an outer diameter of an opening at one end of the mounting hole 2c is larger than an outer diameter of the ball 3a, and an outer diameter of an opening at the other end of the mounting hole 2c is smaller than the outer diameter of the ball 3 a. The ball head 3a is arranged in the connecting seat 2 from the orifice at one end with the larger aperture of the mounting hole 2c, and the pin shaft 3b extends out from the orifice at one end with the smaller aperture of the mounting hole 2 c. An anti-abrasion ball sleeve 8 is arranged between the hole wall of the mounting hole 2c and the ball head 3a, and the anti-abrasion ball sleeve 8 is made of polyformaldehyde materials. Still be equipped with gasket 9 in the great one end aperture of mounting hole 2c aperture, the connecting seat 2 of the great one end department in mounting hole 2c aperture inwards the riveting forms turn-ups 2d, gasket 9 closely laminates with turn-ups 2d and abrasionproof ball cover 8 respectively. Wherein, as shown in fig. 4, the abrasionproof ball cover 8 is the cylindric, and the one end that the abrasionproof ball cover 8 is close to round pin axle 3b is the arc surface contact with mounting hole 2c inner wall, and this distolateral portion of abrasionproof ball cover 8 is provided with a plurality of bar grooves 8a along circumference, and bar groove 8a runs through the 8 lateral walls of abrasionproof ball cover, and the length direction in bar groove 8a is unanimous with the axial of round pin axle 3 b.

Example two

The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the fixing member 5 is a plastic open buckle.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The pull rod assembly comprises a pull rod (1) and a joint component connected to one end of the pull rod (1), wherein the joint component comprises a connecting seat (2) and a ball pin (3), the ball pin (3) comprises a ball head (3a) which is positioned in the connecting seat (2) and can swing and a pin shaft (3b) which is fixedly connected with the ball head (3a) and extends out of the connecting seat (2), a dust cover (4) which is cylindrical and provided with openings at two ends and can stretch when the ball pin (3) swings is arranged between the connecting seat (2) and the pin shaft (3b), one end of the dust cover (4) is fixed outside the connecting seat (2), the pull rod assembly is characterized in that an annular groove (3b1) is arranged on the pin shaft (3b), a first connecting part (4a) which is annular and extends out of the dust cover (4) is arranged at the opening part at the other end of the dust cover (4), the first connecting part (4a) is embedded in the annular groove (3b1) and abuts against the groove walls at two sides of the annular groove (3b1), and a fixing piece (5) which enables the inner circumferential surface of the first connecting part (4a) to be tightly attached to the outer wall of the pin shaft (3b) at the annular groove (3b1) is arranged on the outer side of the first connecting part (4 a).

2. The drawbar assembly according to claim 1, wherein the first connecting part (4a) has an annular mounting groove (4a1) on the outside, and the fixing member (5) is disposed in the annular mounting groove (4a 1).

3. A drawbar assembly according to claim 2, characterized in that the fixing member (5) is a plastic clamping band.

4. A drawbar assembly according to claim 2, characterized in that the fixing member (5) is a plastic snap.

5. The pull rod assembly of claim 1, 2, 3 or 4, wherein the pin (3b) is provided with an annular retaining shoulder (3b2) and an annular block (3b3) in sequence along the direction away from the ball head (3a), the annular groove (3b1) is formed between the annular retaining shoulder (3b2) and the annular block (3b3), the pin (3b) is connected with a locking nut (6) in a threaded manner, and the side part of the annular block (3b3) is provided with two symmetrically arranged straight surfaces (3b 31).

6. The pull rod assembly according to claim 1, wherein a second connecting portion (4b) which is annular and extends out of the dust cover (4) is arranged at an end opening portion of the dust cover (4) which is matched with the connecting seat (2), an annular matching groove is formed outside the connecting seat (2), the second connecting portion (4b) is sleeved in the annular matching groove, a clamp (7) is arranged outside the second connecting portion (4b), an annular flange (2b) is formed between one side surface of the connecting seat (2) which extends out of the pin shaft (3b) and one side groove wall of the annular matching groove, an annular concave portion (4c) is formed at the joint of the second connecting portion (4b) and the inner side wall of the dust cover (4), and the annular flange (2b) is embedded in the annular concave portion (4 c).

7. A tie rod assembly according to claim 6 wherein the annular recess (4c) is in cambered contact with the annular flange (2 b).

8. The pull rod assembly according to claim 1, wherein a mounting hole (2c) is formed in the connecting seat (2) in a penetrating manner, the aperture of an orifice at one end of the mounting hole (2c) is larger than the outer diameter of the ball head (3a), the aperture of an orifice at the other end of the mounting hole (2c) is smaller than the outer diameter of the ball head (3a), the ball head (3a) is installed into the connecting seat (2) from an orifice at one end of the mounting hole (2c) with a larger aperture, the pin shaft (3b) extends out from an orifice at one end of the mounting hole (2c) with a smaller aperture, an anti-abrasion ball sleeve (8) is arranged between the hole wall of the mounting hole (2c) and the ball head (3a), a gasket (9) is further arranged in an orifice at one end of the mounting hole (2c) with a larger aperture, the connecting seat (2) at the end of the mounting hole (2c) with a larger aperture is riveted inwards to form a flanging (2d), and the gasket (9) is tightly attached to the flanging (2d) and the anti-abrasion ball sleeve (8) respectively.

9. The pull rod assembly of claim 8, wherein the anti-wear ball sleeve (8) is cylindrical and made of polyformaldehyde material, one end of the anti-wear ball sleeve (8) close to the pin shaft (3b) is in arc surface contact with the inner wall of the mounting hole (2c), a plurality of strip-shaped grooves (8a) are circumferentially arranged on the side part of the end of the anti-wear ball sleeve (8), the strip-shaped grooves (8a) penetrate through the side wall of the anti-wear ball sleeve (8), and the length direction of the strip-shaped grooves (8a) is consistent with the axial direction of the pin shaft (3 b).